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Appliances and equipment shall be
installed in accordance with the manufacturer's installation
instructions. Electrically heated appliances and equipment
shall be installed with the required clearances to combustible
materials. [110.3(B) and 422.17)

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Cord-and-plug-connected appliances
shall use cords suitable for the environment and physical
conditions likely to be encountered. Flexible cords shall
be used only where the appliance is listed to be connected
with a flexible cord. The cord shall be identified as suitable in
the installation instructions of the appliance manufacturer.
Receptacles for cord-and-plug-connected appliances shall be
accessible and shall be located to avoid physical damage to
the flexible cord. Except for a listed appliance marked to indicate
that it is protected by a system of double-insulation, the
flexible cord supplying an appliance shall terminate in a
grounding-type attachment plug. A receptacle for a cord-and-plug-
connected range hood shall be supplied by an individual
branch circuit. Specific appliances have additional requirements
as specified in Table E4101.3 (see Section E3909).
[422.16(B)(1), (B)(2)]

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The
overcurrent protection for a branch circuit that supplies a
single nonmotor-operated appliance shall not exceed that
marked on the appliance. Where the overcurrent protection
rating is not marked and the appliance is rated at over
13.3 amperes, the overcurrent protection shall not exceed
150 percent of the appliance rated current. Where 150 percent
of the appliance rating does not correspond to a standard
overcurrent device ampere rating, the next higher
standard rating shall be permitted. Where the overcurrent
protection rating is not marked and the appliance is rated
at 13.3 amperes or less, the overcurrent protection shall
not exceed 20 amperes. [422.11(E)]

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Each appliance shall be provided
with a means to disconnect all ungrounded supply conductors.
For fixed electric space-heating equipment, means
shall be provided to disconnect the heater and any motor controller(s) and supplementary overcurrent-protective devices.
Switches and circuit breakers used as a disconnecting means
shall be of the indicating type. Disconnecting means shall be
as set forth in Table E4101.5. (422.30, 422.35, and 424.19)

Branch circuit breaker or switch located within sight of appliance or such devices in any location that are capable of being locked in the open position. The provision for locking or adding a lock to the disconnecting means shall be installed on or at the switch or circuit breaker used as the disconnecting means and shall remain in place with or without the lock installed.

For permanently connected motor-operated appliances with motors rated over ⅛ horsepower, the branch circuit switch or circuit breaker shall be permitted to serve as the disconnecting means where the switch or circuit breaker is within sight from the appliance. Where the branch circuit switch is not located within sight from the appliance,the disconnecting means shall be one of the following types: a listed motor-circuit switch rated in horsepower, a listed molded case circuit breaker, a listed molded case switch, a listed manual motor controller additionally marked "Suitable as Motor Disconnect" where installed between the final motor branch-circuit short-circuit protective device and the motor. For stationary motors rated at 2 hp or less and 300 volts or less, the disconnecting means shall be permitted to be one of the following devices:

A general-use switch having an ampere rating not less than
twice the full-load current rating of the motor.

On AC circuits, a general-use snap switch suitable only for use
on AC, not general-use AC-DC snap switches, where the
motor full-load current rating is not more than 80 percent of
the ampere rating of the switch.

A listed manual motor controller having a horsepower rating
not less than the rating of the motor and marked "Suitable as
Motor Disconnect".

The disconnecting means for motor circuits rated 600 volts, nominal,or less shall have an ampere rating not less than 115 percent of the full-load current rating of the motor except that a listed unfused motor-circuit switch having a horsepower rating not less than the motor horsepower shall be permitted to have an ampere rating less than 115 percent of the full-load current rating of the motor. The disconnecting means shall be installed within sight of the appliance.

Exception: A unit switch with a marked-off position that is a part of an appliance and disconnects all ungrounded conductors shall be permitted as the disconnecting means and the switch or circuit breaker serving as the other disconnecting means shall be permitted to be out of sight from the appliance.

Disconnect permitted to serve as required disconnect for both the heating equipment and the controller where, on the supply side offuses, and in sight from the supplementary overcurrent devices, if the disconnecting means is also in sight from the controller, or is capable of being locked off and simultaneously disconnects the heater, motor controller(s) and supplementary overcurrent protective devices from all ungrounded conductors. The provision for locking or adding a lockto the disconnecting means shall be installed on or at the switch or circuit breaker used as the disconnecting means and shall remain in place with or without the lock installed. The disconnecting means shall have an ampere rating not less than 125 percent of the total load of the motors and the heaters.

Branch-circuit switch or circuit breaker where within sight from the heating equipment or capable of being locked off and simultaneously disconnects the heater, motor controller(s) and supplementary over current protective devices from all ungrounded conductors. The provision for locking or adding a lock to the disconnecting means shall be installed on or at the switch or circuit breaker used as the disconnecting means and shall remain in place with or without the lock installed.The disconnecting means shall have an ampere rating not less than125 percent of the total load of the motors and the heaters.

Disconnecting means in sight from motor controller or as provided for heating equipment with motor rated over ⅛ horsepower with supplementary overcurrent protection and simultaneously disconnects the heater, motor controller(s) and supplementary overcurrent protective devices from all ungrounded conductors. The provision for locking orout supplementary overcurrent protection. adding a lock to the disconnecting means shall be installed on or at the switch or circuit breaker used as the disconnecting means and shallremain in place with or without the lock installed. The disconnecting means shall have an ampere rating not less than 125 percent of the total load of the motors and the heaters.

Thermostats with a marked OFF position that directly open all ungrounded conductors, which when manually placed in the OFF position are designed so that the circuit cannot be energized automatically and that are located within sight of the equipment controlled.

For SI: 1 horsepower = 0.746 kW.

The disconnecting means shall be permitted to be installed on or within the unit. It shall not be located on panels designed to allow access to the unit or located
so as to obscure the air-conditioning equipment nameplate(s).

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Ceiling-
suspended fans (paddle) shall be supported independently
of an outlet box or by a listed outlet box or outlet box system
identified for the use and installed in accordance with Section
E3905.9. (422.18)

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Outdoor receptacles that are not readily accessible and are
supplied from a dedicated branch circuit for electric snow-melting
or deicing equipment shall be permitted to be
installed without ground-fault circuit-interrupter protection
for personnel. However, ground-fault protection of equipment
shall be provided for fixed outdoor electric deicing and
snow-melting equipment. [210.8(A)(3) Exception, 426.28)

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Frames of
electric ranges, wall-mounted ovens, counter-mounted cooking
units, clothes dryers, and outlet or junction boxes that are
part of the circuit for these appliances shall be connected to
the equipment grounding conductor in the manner specified
in Section E3908.9. [250.140 amended]

Exception: For existing branch-circuit installations only
where an equipment grounding conductor is not present in
the outlet or junction box, the frames of electric ranges,
wall-mounted ovens, counter-mounted cooking units,
clothes dryers, and outlet or junction boxes that are part of
the circuit for these appliances may be connected to the
grounded circuit conductor if all of the following conditions
are met. [250.140 Exception]

The grounded conductor is insulated, or the
grounded conductor is uninsulated and part of a type
SE service-entrance cable and the branch circuit
originates at the service equipment. [250.140 Exception
(3)]

Grounding contacts of the receptacles furnished as
part of the equipment are bonded to the equipment.
[250.140 Exception (4)]